Apparatus and method for cleaning articles utilizing supercritical and near supercritical fluids
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United States of America Patent
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Mar 28, 1995
Grant Date -
N/A
app pub date -
Jun 30, 1992
filing date -
Jun 30, 1992
priority date (Note) -
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Abstract
Disclosed is an apparatus and method of removing contaminants from an article utilizing a supercritical or near supercritical fluid. The article to be cleaned is first contacted with a fluid in which the contaminant is soluble at a first supercritical or near temperature. The contaminate solubilized fluid is then cooled or heated to a second supercritical or near supercritical temperature to lower the solubility of the contaminant in the supercritical fluid and thereby precipitate the contaminant. The contaminant is then recovered.
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